For the first time since the OS X beta test of 2000, Apple is allowing Mac users to test and provide feedback on a prerelease version of OS X. The first 1 million people to sign up for the beta program through Apple's Web page -- which crashed under heavy traffic on Thursday after the public beta became available -- get a redemption code to download the Yosemite beta via the Mac App Store.
If you're lucky enough to be one of those beta testers, congratulations! Here's a quick rundown of what you should know and keep in mind about the beta as you start poking around Apple's latest operating system. (The final version is due out this fall.)
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1. The beta is a work in progress
First and foremost, keep in mind that this isn't the official release of the software; Apple is still testing and tweaking Yosemite. That means it may not function as expected. Some features may be completely absent or could differ from what Apple showed off during its WWDC keynote in June -- and some features may look very different in the final release. Even some of the standard features available in Mavericks or earlier versions of OS X may be missing, nonfunctional or just different. That's because a major OS upgrade, particularly one like Yosemite that makes major changes to the user experience, often involves updating or altering existing functions, including core components that aren't visible to most users.
2. A public beta isn't the same as a developer preview
Apple has already released beta versions of Yosemite to members of its Mac developer program. The most recent was made available to them earlier this week, with revisions arriving roughly every two weeks. In fact, the version of Yosemite offered as the public beta has a different build number (it's one digit higher) than the version developers received on Monday.
Apple's FAQ for the Yosemite beta indicates that beta testers may not see updates at the same rate as developers. There's a good chance this means beta testers will see less frequent updates than developers.